1.	Simplify 1 Simplify the following expression: $$ {\left(-6 - 2\right)}^{2} + \left(-4 - 1\right)\left(3 + -3\right) $$ Correct Answer $$ 64$$ or 64.0000

2.	Simplify 2 Simplify the following expression: $$ \frac{3 - -6}{2\times3}2\left(-4 - -6\right) $$ Correct Answer $$ 6$$ or 6.00000

3.	Fractions 1 Simplify the following expression: $$ \frac{5}{4} - \frac{-2}{6} $$ Correct Answer $$ \frac{19}{12}$$ or 1.5833333333333333

4.	Fractions 2 Simplify the following expression: $$ \frac{1}{3}\frac{-2}{4} $$ Correct Answer $$ \frac{-1}{6}$$ or -0.16666666666666666

5.	Significant figures 1. Write the following to 3 significant figures: 1.5547754 Correct Answer 1.55 or $$1.55\times10^{0}$$ 2. Write the following to 4 significant figures: 269.62993 Correct Answer 269.6 or $$2.696\times10^{2}$$

6.	Standard Form 1. Write the following in standard form to 3 significant digits: 545435 Correct Answer $$5.45\times10^{5}$$ 2. Write the following in standard form to 5 significant digits: 0.0000698953 Correct Answer $$6.9895\times10^{-5}$$

7.	Significant figures 1. Write the following in preferred standard form to 3 significant digits: 30.75 Correct Answer $$30.8\times10^{0}$$ 2. Write the following in preferred standard form to 4 significant digits: 28037.8 Correct Answer $$28.04\times10^{3}$$

8.	Simplify 2 Simplify the following expression: $$ \frac{5 + -3}{6 + 5} - 2\times5\times4 $$ Correct Answer $$ \frac{-438}{11}$$ or -39.8182

9.	Simplify 1 Simplify the following expression: $$ \left(5 + 1\right)\left(6 + 3\right) - {\left(2 + 2\right)}^{2} $$ Correct Answer $$ 38$$ or 38.0000

10.	Simplify 2 Simplify the following expression: $$ 2\left(-2 - -6\right) - \left(3 - 3\right)\frac{5}{-5} $$ Correct Answer $$ 8$$ or 8.00000